<!DOCTYPE html>
<title>Test location.ancestorOrigins</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="resources/utils.js"></script>

<body>

<script>
promise_test(async () => {
  const location_ao_key = KEYS["location.ancestorOrigins"];
  const location_ao_ack_key = KEYS["location.ancestorOrigins ACK"];

  // We load the top-level fenced frame in a cross-origin, so that we can
  // more-completely verify the important cross-origin
  // `location.ancestorOrigins` case.
  const cross_origin = get_host_info().HTTP_REMOTE_ORIGIN;
  const cross_origin_fenced_frame =
      new URL('/wpt_internal/fenced_frame/resources/location-ancestorOrigins-inner.html',
              cross_origin);
  attachFencedFrame(cross_origin_fenced_frame);

  // Get the result for the top-level fenced frame.
  const fenced_frame_result = await nextValueFromServer(location_ao_key);
  assert_equals(fenced_frame_result, "", "The top-level fenced frame has the " +
                                         "right ancestor origins");

  // Write an ACK, so that the fenced frame knows it can send message over the
  // `window_parent_key` channel again.
  writeValueToServer(location_ao_ack_key, "ACK");

  // Get the result for the iframe inside the fenced frame.
  const iframe_in_fenced_frame_result = await nextValueFromServer(location_ao_key);
  assert_equals(iframe_in_fenced_frame_result, cross_origin, "The iframe " +
                "inside the top-level fenced frame has the right " +
                "ancestor origins");

  writeValueToServer(location_ao_ack_key, "ACK");

  // Get the result for the nested fenced frame.
  const nested_fenced_frame_result = await nextValueFromServer(location_ao_key);
  assert_equals(nested_fenced_frame_result, "", "The nested fenced frame " +
                "inside the top-level fenced frame has the right ancestor " +
                "origins");
}, "location.ancestorOrigins");
</script>

</body>
